Strip-perforator.



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' STRIP PERFORATOR.

APPLIOATIONTILED JAN. 10, 1905. 915,537.

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J. S. BANGROFT & M. G. INDAHL.

STRIP PERPORATOB.

APPLICATION FILED JAR. 10, 1905.

Patented Mar. 16, 1909.

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STRIP PERFORATOR.

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STRIP PERFORATOR.

APPLICATION FILED JAN. 10, 1905.

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JOHN SELLERS BAN CROFT AND MAURITZ C. INDAHL, OF PHILADELPHIA, PENNSYLVANIA,

ASSIGNORS TO LANSTON MONOTYPE MACHINE COMPANY, OF PHILADELPHIA, PENNSYL- VANIA, A CORPORATION OF VIRGINIA.

s'rRIP-PERFoRA'roR.

To all whom it may concern:

Be it known that we, JOHN SELLERS BAN- cnor'r and M AURITZ C. INDAHL, both citizens of the United States, residing at Philadelphia,

in the county of Philadelphia and State of.

Pennsylvania, have invented certain new and useful Improvements in Strip-Perforators; and we do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the figures of reference marked thereon.

This invention relates to machines for producing one or more longitudinal series of equally spaced perforations in a strip or band of flexible material, such as paper, to serve as a register and feeding means for recordstrips or controllers in their passage through composing and type casting machines of the monotype system, as exhibited, for example, in Patents 628,620; 654,115, 625,998 and ($33,088, but is applicable to other uses, and it has for its principal ob'ects to provide a high speed punching mec anism competent to' produce said serial perforations with great accuracy and equipped with means for automatically detecting and locatin imperfections in the material such as won (1 interfere with its normal functions as a controller.

3 type casting or other machine. The feeding set comprises two parallel continuous series of equally spaced perforations extending along opposite margins of the strip, while the control perforations occupy the space between said feeding perforations and are located at different positions transversely of the strip and at regular intervals in its length.

It is of the utmost importance that the two series of feeding perforations should be truly formed on parallel lines and e ually spaced throughout each series in or or to preserve registry with the; feeding devices, and the correct presentation .of'the control perforations to the control mechanism. of the casting or other machine. These marginal feeding perforations are usually formed in Specification of Letters Patent.

Application filed January 10, 1905.

Patented March 16, 1909.

Serial No. 240,493.

the strips before they are supplied to the composing machine, and during this preliminary operation the strips are inspected for imperfections in the material, suchas would interfere with the control signals, thereby avoiding a-separate or additional rewinding for this purpose. forations and weak spots is the method comf monly employed, and this isrendered possible by the relatively slow action of the punchinginiechanism, with its intermittent feeding mechanism, so that in the interval between successive feed movements the operator can view the stripes it is rewound.

The advantages derived from the intermitting feed in the way of inspection are more than offset by the reduction in speed incident thereto, and numerous attempts have been made to increase the speed of production even at the expense of an additional rewinding' for inspection. Among others rotary punching machines have been proposed as possessing the quality of continuous feeding motion, hence speed, but this, it has been found, is more than off-set by the defects incident to the system, 'i. 0., rapid deterioration of the punches and dies due to the angular motion of one upon the other, and the consequent irregularit and inaccuracy in the perforations and t e delays and expense of repair.

All these difficulties are overcome by this invention which consists, broadly, first in the employment of a reciprocating punching mechanism in connection with a continuous, as distinguished from an intermittent, feeding mechanism so asto render availablethe inherent advantages of said types of niech: anism in the; way of accuracy, endurance and speed; second, in providing an automatic inspectoradapted to detect and locate defects in-theinaterial'while the latter is in motion;

isual inspection for per and third, in minor features of construction,

combination and arrangement, all as herein-i after fully, described.

In the accompanying drawingsillustrat= ing a preferred form of embodiment-Figure 1 is a rear elevationof the machine,r Fig. 2-

is an end view. Fig. 3 is a perspective view of the breast or vacuum chamber forming part of the detector. Fig. 4 a vertical section on the'line a:a; Fig. 1. Figs. 5 and 6 and 7 are detail-views illustrating the punch car'- rier, its retainer and retractor, and the actu-' ating devices therefor in different positions.

assumed when in action. Fig. 8 is a longitudinal section through the punch bar and punchcarryin and actuating devices, the

cams and their shafts being in elevation.

Fig. 9 is a detail ofthe punch, its carrier and retractor, said parts being shown separated and in perspective. Fig. 10 is a detail v1ew of a portion of the trip for the driving mech-- anism. v

Like numerals deslgnate corresponding parts in the several figures.

The unching mechanism illustrated is of 1 the material in a direction transverse to the line of reciprocation of the punch should be suspended while the latter is traversing the material in order to prevent tearing or mutilation due to the drag against the side of the punch. It has been demonstrated, however, that it is not only possible, but entirely practical in the case of thin material such as paper to so proportion the movements of the punch and paper that the GIfOI'QrtIOIIS CQJI accurately be produced Wlll e the papers in motion without danger or liability of tearing or mutilation from this cause. To accomplish this it is necessary that the speed of the punch while in engagement with the paper should greatly exceed the feeding movement of the latter, and that the duration of such contact should be reduced to the minimum or just sufficient to effect a clean cut, and the mechanism illustrated is of such character. q

The die 2, preferably detachably secured to its supportmg bar 3, is held in fixed relation to a stripper bar 4, the latter perforated to form a guide for the punch 1, said bars 3 and 4 being grooved or spaced to form a passage 5 and edge guides 6, for the paper, as by recessing the proximate faces of the bars after the manner shown in Fig. 8.

Two punches and complementary dies are shown, one near eachend of passage 5,'but as they are duplicates, a'description of one punching. mechanism will serve for both. he punch 1, consists of a short section of wire provided at one end with a head 7 adapted to enter and be retained in an open socket or bearing 8 formed in the head 9 of a carrier in the form of an elastic bar 10, whose opposite end is firmly attached to a cross bar 11 or other portion of the frame. The

bar 10 is preferably reduced in section intermediate head and the point of attachment 'to'the frame, to increase its flexibility and reduce inertia. Attached at one end to the frame and extending alongside bar 10 is a second and. somewhat heavier or stronger spring bar 12, provided with an offset or s oulder 13 above and inposition to engage head 9 .and servin as a retractor therefor. As thus arranged ar- 12 closes the side of open bearing 8 and serves as a keeper for the unch.

Beneath the heads or free ends of bars 10 and 12- and in position to engage the latter are two cams 14, 15, carried by a shaft 16 rotatin in bearings inthe frame. These cams are 0 relatively different pitch but of sub-. stantially the same projection and termination, the shorter and steeper cam 14 engagin the punch carrier 10 and the longer am smaller angle cam 15 engaging lever 12.

The purpose of this arrangement is two fold, first, to. effect a short quick reciprocation of the punch by successive applications of drivers operating in opposition, and, second, to overcome inertia and diminish resistance. As shaft 16 revolves cam 15 acts first upon bar 12, to gradually deflect the latter, thereby placing it under tension'and at'the same time withdrawing shoulder 13 from head 9. When the bar 12 is at or near the extreme end of its motion, cani 14 engages head 9, to quickly advance the punch and drive it through the paper,- whereupon both cams pass off their respective bars, releasing the latter and )ermitting their return to position. The su den release of the'heavier and stronger spring 12 constituting the driver causes its shoulder 13 to immediately impinge upon punch bar 10 thereby-instantly reversing the motion of the punch and effecting its instantaneous withdrawal from the paper. If the punch carryingspring bar wasmade sufiiclentl heavy toobtain the quick return desired it would not only greatly increase the resistance incident to thesharp angle of its driving cam, but the inertia, due to increased weight, would tend to delay the nick return desired.

As it is, the bar 10 is ma e light, its principal function being to preserve contact with the cam, and the inertia of the heavier bar 12 is materially reduced by the slowerrate of motion'derived from the longer cam, so that it is practicall at rest and under maximum tension at t e instant bar 10 leaves its cam, while arm 13 serves as a stop to limit the motion of the punch and prevent overthrowing.

To facilitate the proper adjustment and location of the two punches the following arrangementv has been deviscd.-Through each end of bar 4 is threaded. a tubular screw 17, the latter surrounding a stud or bolt 18 and engaging a bearing on the frame. Each screw 17 passes upward through a socket in the bar 3 and is provided with a head 19 fitted to a collar 20 in a manner to permit 'independent longitudinal movement and compel slmultaneous rotary movement.

i spend with the marginalperforations formed Collar l' in the strip by the punches; The roll 32 is longer than the head of screw 17, in the controls the rate of feed, and in order to direction of its traverse, and it occupies a 5' position intermediate bar 3 and a washer 21, the latter surmounted by a nut 22 onbolt 18. To adjust the dies-in proper relation to the punches, nuts 22 are loosened, and by the application of a spanner or its equivalent to collars 20, screws 17 may be turned to shift bar 4, and when the desired position of adjustment has thus been obtained bar 3 is clamped firmly in place and screws '17 held against accidental displacement by setting latter pivotally supported and in proximity to .lower rod 26, while the nuts 22 down u on washers 21, the latter acting through t 1e collars 20 to clamp bar 3 upon bar 4, and at the same time to clamp the screws 17 upon their bearings. A brace rod 23 connects the bar 4 with the frame in a lane transverse to the bolts 18, to assist the atter in maintaining the punching mechanism rigidly in position.

The feeding mechanism employed for advancing the stri continuously-is coupled with the driving cevice for the punches in order to synchronize their action and produce the perforations at regular predetermined intcrvals'. The spool 24 from which the supply of paper is. withdrawn is suported u on brackets 25 secured toithe ront of t e frame. below the axis on which the spool is supported is arranged a tension and take up device in the formof two parallel rods 26 carried inv the outer endsof links 27, the u on the frame to swing, by gravity, away l f'om the spool. The paper stri is conducted beneath the lower rod 26 see Fi 4) which it partly encircles, being asse forward between the two rods and t ence upward to the plat-- form or plate 28 in front of the bars 3 and 4 of the unching mechanism. Pivoted to arms or links 27 is a lever or apron 29 one arm whereof carries a bar 30 parallel with other arm .31 is in the path of and borne upon by the paper strip intermediate the upper rod 26 and front edge of plate 28, the arrangement being such that under normal conditions the links 27 and. their connections will be supported by the friction of the paper in its passagebetween bars 26, thereby establishing a uniform de ree of tension upon the strip; but should t e frictional resistance be materially diminished, as by the overrunning of the su ply spool, the. descent of the-links and ro( s incident thereto would correspondingly advance the power end of lever 29 and cause its weight end or bar 30 to press the strip against the surface of the lower bar 26. As the strip leaves the punching. mechanism it is conducted around a bar 32 onto the feeding" In rear of and slightly insure proper engagement the strip is held to more than half the circumference of the roll by a rod or roller 34 held to position by end guides 35 on the frameand resting in a fold of the strip, said bar also serving as a variable tension and take up for the rewinding mechanism, the latter comprising two rolls 36 mounted in the frame in parallel relation, and a frame, 37 movable in guides in a direction substantially perpendicular to a plane passing through the axes of rolls 36. [he spool upon which the paper is wound is supported u on a pinv 38 carried by frame 37, the roll bem held in frictional contact with the peripheries of the winding rolls 36 by a third roll 39 whose support 40 is guided to moveradially of the axis of the spool. Rolls 36 are each provided with heads or flanges 41 to serve as guides in directing the strip. The punching, feeding and winding mechanisms are geared togetheras follows:The driving pulley 42 is fast on shaft 16 and the latter is coupled through spiral gears 43 with a worm shaft 44, the latter en aging, a worm wheel 45 whose teeth mes with pinions on rolls 32 and 36,

thereby insuring correlative motion'of the punching and feeding devices. p

- The driving shaft 16v 's provided with a suitable, controllable driving mechanism which it can be coupled and uncoupled with its motor represented, in this instance, by fast and loose ulleys 42,42", and a belt shifter 46, the latter carried by a bar 47 acted'upon by a s ring 48, to hold the shifter in osition with t. 1e belt on the fast pulley, anr rovided with a" rock shaft 49 and hand e 50 whereby the belt shifter can be 4 moved against the tension of its s ring to transfer the belt from'the fast to as loose pulley. E 'uivalent forms of driving mechanism provided with means for coupling and uncoucpling the prime mover may be employe in ieu of that shown. I a

. The automatic inspector is located in position to engage the stri in its passage mm the supply to the rewmding spool and in the present instance it is located intermediate the front roller 36 and the tensioning rod 34.- I

To theframe is secured a breast 51 pro-' vided with flat margins 52' overwhich the 12.0 paper is tightly drawn by the winding devices, the central section being cut away, more or less, to form a vacuum box or chamber 53, communicating through a ipe'54, with the interior of a chamber 55. T trated, the face of the breast is grooved to present a series ofchannels extending transversely of the strip, said. channels communieating through ports 56 with a'chamber 57 within the breast to which the pipe'54 is con 130 n the form illusnected. The object is to rovide a vacuum box or chamber of which t e paper strip, as

it passes through the machine, serves as a closure for preventing the in ress of air, the transverse ribs between the c annels merely serving as intermediate supports, to prevent the buckling of the stri an the breakmg of the vacuum incident t ereto. Chamber 55 is provided with a piston 58, preferably of the diaphragm form, to which is coupled a retracting means, such as s ring 59, con-' with piston 58, conseqluently, so long as the paper strip covering t e vacuum chamber is of a quality and texture to prevent the entrance of sufiicient air to materially diminish the pressure henceis adapted for use as a controller, tlie piston will be held to position in chamber 55; but when a perforated or weak section of the paper is brought over the vacuum chamber, air is admitted in suflicient vdlume to partially or wholly destroy the vacuum in chamber 55 and the piston is at once retracted. Such would be the action the perforation was large or the machine was run slowly, !but at the hlgh rate of speed for which this machine is specially designed the smaller erforations won (1 pass the inspector so rapidlythat the piston could not be fully retracted before the vacuum was reestablished.

- To prevent this and insure not only a prompt but complete movement of the iston whenever a defective section of t e lpaper is reached, chamber is provided wit a quick action valve-62 res onsive to a slight variation in pressure an operating to quickly admit air and thus completely break the vacuum in said chamber so that the piston is free to respond to'its retracting spring.

In the preferred form illustrated the quickaction valve 62 is located in a duct in the head of chamber 55 opposite piston 58, said valve seating outward and bemg engaged .by the piston, to close the inlet passage, when the piston is at the inner end of its stroke under the influence of atmos heric pressure.

' The inlet passage 63 is in t s instance located within the stem of valve 62, its lower end terminating at or above the seat for said valve. So long as the normal vacuum is maintained inchamber 55 piston 58v holds valve 62 to its seat and prevents the admission of air through passage 63, but the momentthe vacuum is broken at chamber 53 and piston 58 begins to withdraw valve 62 purpose valve.

will immediately unseat and admit air presence of a defect in the strip indicated,-

and it remains to be seen how the position of the defect is located so that it may, if desired, be cured, as by pasting a stri over it, or the stri be rejected as unsuite for the esired. This is accomplished through the stopping mechanism, to which end rock shaft 49 whose arm 64 engages the belt shifter bar 47 is provided with an arm 65 in position to be engaged by a latch 66, the latter pivotally supported upon a bracket attachedto the frame and having its opposite end beneath a shoulder 67 on iston rod 60, the arrangement being such t at when the belt shifter 46 is opposite fast pulley 42 with spring 48 under compression, latch 66 will engage arm 65, to hold the belt-shifter in osition. This is the condition when startmg. after the pa er strip has been threaded up to close the chamber 53, the atmos heric pressure on piston 58 serving to hold t e latter up in osition against the quick action manner explained, and piston 58 is retracted by its s ring, shoulder 67 will engage latch 66, to re ease arm 65, thus permittmg spring 48 to move the belt shifter and the belt from the fast to the loose pulley, thereby bringing the machine, to rest with the section of the strip containing the perforation or weak spot op osite breast 51.

11 order that the ingress of air through the quick action valve may be automatically inen the vacuum isbroken, in the terrupted immediately the driving mechanism has been disconnected, a lever 68 is arranged with one arm beneath'a shoulder 69 on piston rod 60 and the other arm in position to be engaged by a pin or shoulder 70 on arm 65, so that when the latter is unlatched and thrown back itwill ride against lever 68 and elevate iston 58 to close the valve 62, holding the atter in position until the machine is again started up by reengaging arm 65 and latch.

To limit the size of the spool and prevent overwinding the frame 37 carrying the spool and which 1s elevated as the paper is wound upon the latter, is provided with a rod or extension 71 havingan arm 72 in position to engage one arm ofa lever 73, the opposite arm whereof .is coupled with latch 66. As

frame 37 rises this arm 72 engages lever 73 to raise latch 66 and thus stop the machine. A treadle or other convenient means can be connected with this rod 71, to serve as a Com 7 automatic inapector'for the material ope ated upon said inspector being adapts to detect perforations and operating in, a field distinct from that acted upon by the punching devices. 7.

' 2. A. perforating machine provided with punching and feedm mechanisms and automatic means for in eating the presence of perforations or Weak spots in the material operated upon. I

3. The combination with a perforating machine ,of means for automatically. indicating and locating perforations in the material op erated upon at points beyond the field of the terial as it passes through the machine.

5. As a means for actuating. the movable member .of a punching mechanism the combination of a carrier, a cam acting through said carrier to advance the lattena retracting member, and means'independent of the cam and carrier for actuatlng said retracting Imember, to engage the carrier and return it immediately it is released by the cam.

. the retractor, to move its shoulder away from I 6. In a perforating machine such as described, the combination with the punch, its

carrier and driving cam, the latter rovided with an abrupt releasing shoulder, o a yielding retractor adapted to engage the punch carrier in a '(iilGGtlOIl opposed to the cam action, and a second cam of less angularity than the first and operating 11 on the retractor toadvance it beyond t ie point to which the punch carrier is advanced while incontact with its cam, the terminal shoulder of said second cam registering with that of the first cam.

7. In a perforating machine such de-- scribed, thecombination wlth the punchand its spring bar carrier, a spring bar retractorprovided with-a shoulder overlapping :the

punch carrier, a driving shaft, and two-cams differing in length, thelonger cam engaging the punch carrier, and the shorter cam engaging the punch carrier, to quickly advance the latter and complete itsstroke preliminary to the-release of the retractor.

8. In a perforating machine such as described, the combination ofthc following elements, to Wit; a spring bar iixedat'one end{ and carrying a punch at its opposite or free end; a second spring bar provided with an arm or shoulder overlapping-thefree end of the first bar; and a driving shaft provided with two cams of different lengths or-angles with their terminals in register, theshorter cam contacting with the free end ofthe first or punch carrier bar and the longer. cam-with the free end of the second or retractor bar.

" a retractor bar closing the open side of the with the separa spool.

supported b I In a per 'forating machine such as descr1bed-,- the combination with the punch carrier bar provided with an 0 en sided socket forthe reception of a heade punch, of

socket andprov ided with an engaging shoulder overlapping'said punch bar.

10. In a perforating machine such as described, the combination with the stationary die and reciprocating punch, of the elastic punch carrying bar fixed at one end and provided with means for attaching the punch to its free end ;-an elastic retractor bar extending in parallel relation with the punch bar with one and fixed and the other or freeend provided with an engaging arm overlapping the free end of the punch bar and a drving shaft extending transversely of the two bars and provided with .two can surfaces of different lengths but corresponding projection their terminating'shoulde'rs being in register, the

shorter cam operating upon the punch bar and the longer .cam upon the retractor.

11. In a perforating machine such-as described, asa means for adjusting the punching mechanism in gpsition, the combination ble ars carrying the die and the guide for its punch, of the tubular screw guided in the upper and threaded through the lower bar, said screw'surrounding a stud and engaging a bearing on the frame; a collar movab e ongitudinall-y of the screw and engaging the head thereofsaid collar contacting with the u )per bar; a washer engaging said collaryan a nut on the stud engaging said washer and operating to clamp the two bars together and the screw u on its bearing.

12. In a perforating machine such as described the combination with the supply spool and strip-feeding devices, of a strip @QIISIOII device comprising a plurality of parallel bars for engaging a-bight of the strip supported to swing freely in a path intersecting the strip and away from thesupply 13. In a perforating machine such as described, a tension'device for the strip as delivered from the supply spool to the punching devices,the same comprising in combination a'lateralliyrsmovable-bar adapted to' be iction inafold or turn of the strip, an'd a ever movablewith said her and having one member in position to clamp the strip. upon the bar and 'theother member in positionto engage the stripat a point beyond said bar as the position of the latter is shifted.

14. In a tension device for a perforating machine such as described, the combination of the following elements, to wit:. a plurality of rods in arallel relation about which the strip trave s; pivoted links or arms-supporting said rods to permit them to swing laterally of the strip; and a friction clamp mounted-upon said links and provided with an actuating member held in such relation to defects contained therein, to arrest the the path traversed by the strip that when said bars are swung laterally beyond a predetermined position the strip will operate said member to apply the clamp;

15. In a perforating machine such as described provided with reciprocating punching mechanism and incombination therewith a continuous feeding mechanisnr rovided with a feed roll in rear of the punc ing devices and a take-up and tension device engaging the strip in advance of its delivery to said punching devices. 16. In a perforating machine such as described the combination of the following elements, to wit; a punching mechanism provided with a reciprocating member, such as a punch, driven by a continuously revolving shaft; a feeding mechanism provided with a toothed roll engaging the perforations in the strip as the latter is delivered'from the punching mechanism; and transmitting devices coupling the punch shaft and feed roll to cause them to rotate in unison as and for the purpose set forth.

17. In a perforating machine such as described the combination of the following elements, to wit; areciprocating punching mechanism provided with a continuously revolving, driving shaft; a continuously acting feeding mechanism provided with a pin wheel located in rear of the punching devices and engaging the perforationsv in the strip; transmitting devices connecting said punch shaft and pin wheel, to cause simultaneous rotation thereof, and a tension device engaging the strip'in advance of its delivery to the punching devices.

18. In a perforating machine such as described, the combination of the following elements, to wit; a support for the supply spool; a bar or apron over which the strip is conducted in itspassage to thepunching mechanism; a tension device located intermediate said spool support and bar and engaging the strip; a reciprocating punching mechanism in rear of said bar; a pm roll in rear of the punching devices; a rewinding scribed,

mechanism engaging the strip inrear of said feed roll; and continuously, as distinguished from intermittingly, o crating driving mechanism for said pin roll.

19. In aperforating machine such as deprovided with reciprocating. punching mec anism and a continuously acting .feeding mechanism,- and in combination therewith an automatic inspector cooperating with the strip to indicate thepresence of defects, such as perforations, occurring therein.

20. In a perforating machine and in combination with the punching and strip feeding mechanisms thereof, an inspector for the strip engaged by thelatterand operated by punching mechanism.

21. In a perforating machine and in combination with the punching and strip feeding mechanisms thereof an inspector engaging I the strip and actuated bdefects contained therein to arrest the fee ing mechanism.

22. In a perforating machine and in com-' bination with its punching and strip feeding mechanisms, an automatic inspector engaged by the strip and actuated by defects contained therein to arrest both the punching and feeding mechanisms. 23. In a perforating machine the combination with the punching and strip feeding mechanisms, of an automatic inspector provided with a vacuum chamber of which the strip constitutes the closing element.

24. The combination with a strip feeding mechanism of an automatic inspector con.- trolled by the strip and operating to indicate the presence of perforations and weak spots occurring therein.-

25. The combination with a stri feeding mechanism provided 'with detacha ledriving mechamsm of an automaticins ector controlled by the strip and operated y defects occurring therein to disconnect said driving mechanism.

26. In a perforating machine and in COm-. bination with the punching and strip feeding mechanisms thereof, an inspector, for .de tecting defects in the strip, provided with an open sided vacuum chamber ada )ted to be closed by the strip, and a piston w ose cylinder or chamber is in 0 en communication with said vacuum cham er and an exhaust,

and means for retracting thepiston when the vacuum is broken by the presence of aperforation in the section of the strip forming part of said vacuum chamber.

27. In a perforating machine and in combination with the punching and strip feeding mechanisms thereof, an automatic inspector for the strip comprising a vacuum box or chamber open at the side and provided with marginal seating surfaces for the strip; a piston' whose chamber or cylinder communicates with said vacuum chamber and air exhaust; and a quick action valve controlling an inlet passage, to expedite the action of the piston.

28. In a perforatin machine provided with punching, strip ceding, and driving mechanisms including means for uncoupling or disconnecting the motoryand in combination therewith an automatic inspector for de- 5 tecting defects in the strip as it is fed through the machine, the same embodying in its coni struction a piston controlling the uncoupling devices for the motor and a vacuum chamber or box of which the strip forms the cover or closure, sa1d vacuum box or chamber con-- trolling said piston, to disconnect the motor 7 in the strip.

when the vacuum is broken a perforation v29. A vacuum box or chamber for the automatic strip inspector of a erforatingmachine provided with a plurality of intercom-.

municating channels extending transversely.- of the line of travel of the strips, and a marginal seat for .the strip.

30. An automatic strip inspector for perforating machines such as described, provided with a vacuum box or chamber one side whereof is provided with a marglnal seat admission of air through a supply port.

32. In an automatic strip inspector for perforating machinessiich as described, the combination with the vacuum box or chamber ada ted to receive and, be closed by the materia to b inspected and a chamber containing a pis on and communicating with said vacuum b'ox or chamber and the exhaust apparatus of a quick-action valve opening toward said piston chamber and controlling an inlet passage, said valve being held in closed position against atmospheric pressure by a contact engagement with the piston when and while the latter ismaintained in advanced position by the preponderating atmospheric pressure on one side thereof.

33. In "an-automatic strip inspector for perforating machines such as described the combination with a vacuum box or chamber controlled by the material to'beinspected and a piston chamber communicating therewith and with an exhaust apparatus, of a piston Working in said chamber and provided with retracting means, and a quick-action isms in position to engage the strip in its passage fromone tothe other of said mechanisms.

I 35. In a perforating machine such as described, the combinationof the following elements, to wit; a strip feeding mechanism rovided with means for'detachably couping it with a driver or motor; an inspector trolled bythe material to be inspected and a piston working in a chamber communicating with said vacuum chamber and provided for detecting defects in the inTateriaIpIF-T vided with a v'acuum b'ox or chamber canwith retracting means; and means controlled by said piston and a'cting'upon the driver coupling, to uncouple the-driver.v

In a perforating machine such as described, the combination with the-feeding mechanism of an automatic strip inspector perforating actipg in afield distinct from the devices provided with a movab e member strip for shifting said member.

37. In a perforating machine such-as described the combination of the'following ole-.-

. and means controlled byperforations in the ments, to wit; a feeding mechanism provided with a driver and means for detachably coupling the latter with the feed mechanism; a motor for shifting said coupling devices in a for maintaining said coupling devices in driving relation with the feeding mechanism; and an automatic inspector provided with a movable member-and means controlled by defects in the material for shifting saidmemher, the latter in turn controlling said means for maintaining thecoupling' devices in driving relation, to release the latter and permit the'motor'to shift the coupling devices andthus disconnect the driver.

' 38. In a perforating machine such as described, the combination of the following elements, to wit; a strip feeding mechanism provided with a driver detachable coupdirection to disconnect the driver; means ling means, a motor for shifting said coupling means, to disconnect the driver and a locking device controlling the action of said motor; and an automatic inspector controlled by the strip and provided with a movable member I respondin to defects in the strip and acting upon said ocking device to release the motor, thereby disconnecting the driver from the feedin devices and arresting the strip.

39. n a perforating machine such as described the combination of the following elements, to wit; a strip feeding 1116011811? ism provided with a driver; means for uncoup ing or disconnectin the feeding: devices from the driver incfuding a motor for uncoupling and a detent device for restraining said motor with the driver coupled up with the feeding mechanism; and an auto-' 'matic inspector provided with a vacuum chamber cooperating with the strip and communicating with a chamber containing a piston, the latter provided with retracting means and coupled with the said detent device in a manner to release the motor when the vacuum is broken by the admission of air through the strip.

40. i In a perforating machine such as described rovided with a detachable drivin connect on and means for-uncoupling sai eonnection'for shifting the connection including a motor and a detent, and in combination therewith, a piston acting upon said .detent to release the motor.

41, In a perforating machine such as dc-. scribed, the combination with the motor and detent for the driving connection or coupling of a piston controlling said detont and working in a chamber or cylinder one end whereof communicates with a vacuum chamber and the other with the atmosphere, a motor device for retracting said piston, a quick-action valve 0 ening into said iston chamber and engage by the piston wfien in advanced positlon, to prevent the entrance of air, and means actuated by the motor of the driving iston, to close the quick-action valve preliminary to the renga ement of the detent.

42. n a perforating machine such as described rovided with means for disconiec ing the riving devices includin a motor, an arm coupled therewith, and a latch for engaging said arm, to restrain the motor, and in combination therewith, a piston working in a chamber or cylinder communicating with a vacuum chamber, a valve controllingan infeed motion.

let assage into said chamber and engaged by t e piston to close said passage, a retracting spring for said piston, a shoulder on said piston for engaging the latch, and .a lever engaged by the arm with which the latch cooperates and acting upon the piston to return the latter and close the valve when the driving devices are disconnected.

43. In a perforating machine such as described the combination with the sprin actuated shi per rod, the arm coupled t ere-- with and t e latch engaging said arm, of the piston rod engaging said latch, to release the atter, and the lever engaged by the arm and engaging the piston rod to advance the latter. 44. In a erforating mechanism such as described, th feeding and winding mechanisms of an automaticinspector for the strip adapted to be actuated by perforations therein.

45. In a perforating machine such as described the combination with the strip feeding and winding mechanisms, of an automatic inspector adapted to detect perforations and engaging the strip intermediate said mechanisms.

' 46. In a perforating machine such as described the combination with the strip feeding and winding mechanisms, of an auto matic inspector controlling the connection between said mechanisms and the motor therefor.

47. In a perforating machine such as described and in combination with the feeding devices thereof, means controlled by defects in the strip for automatically arresting the 48. In a perforating machine. such as described and in combination with the feeding e combination with the strip and winding devices thereof, means controlled by defects in the strip for arresting the feed and winding motions.

49. In a perforating machine provided with strip winding mechanism and automatic inspecting devices, the combination with the driving mechanism including uncoupling devices, of means controlled by the strip and acting through the inspecting devices upon the uncoupling devices, to discomieet the winding mechanism.

50. In a perforating machine the combination with a strip inspector provided with a vacuum chamber, a piston and cylinder communicatin therewith and an inlet, of means controlled by the piston for opening said inlet as the piston is retracted.

51. In a perforating machine provided with a strip inspector including a vacuum chamber, piston and an inlet and in combination therewith means controlled by the piston for alternately closing and opening said inlet.

52. In a perforating machine provided with a strip inspector includinga vacuum chamber and piston, and a strip winding mechanism including driving devices and means for uncoupling the motor or driver and in combination therewith means controlled by the spooled or wound strip and acting upon the driving devices of the winding mechanism, to arrest the latter.

'53.. In a perforating machine the combination of the following-elements, to wit; a stri inspector including a vacuum chamber an iston; a strip winding mechanism provide and means controlled by the spooled strip and controlling said driving mechanism to arrest the winding mechanism.

' 54. In a perforating machine the combination of the following elements, to wit; ,a strip inspector including a'vaouum chamber,

with detac able driving mechanism;

piston and inlet controlled by the latter; a

strip windingmeehanis n provided with detachable driving devices; and. means controlled by thcspooled strip for disconnecting said driving devices to arrest the winding. 

